*{
   padding: 0px;
   margin: 0px;  
}

.container{
    width: 1392px;
    outline: 1px red solid;
    margin: 0px auto;
}

.show_header{
    width: 100%;
    height: 540px;
    /* 背景色 */
    /* background-color:  #ccc; */
    overflow: hidden;
    /* 添加背景图片 */
    background-image: url(''); 
}

section{
    width: 100%;
    height: 251px;
    background-color: tomato;
    
}

.show_center{
    display: flex;
    justify-content: center;
    align-items: center;
}

footer{
    width: 100%;
    height: 200px;
    background-color: violet;
}
nav{
  width: 982px;
  height: 61px;
  outline: 1px red solid;  
  margin: 100px auto;
}
.showBox{
     width: 994px;
     height: 160px;
      outline: 1px red solid;
}